고속 병렬형 LM 이진 수열 발생기

이훈재,Lee, Hoon-Jae 한국정보처리학회 2003 정보처리학회논문지 C : 정보통신,정보보안 Vol.10 No.7

LM 발생기는 합산 수열 발생기가 갖고 있는 최대 주기, 최대 근사 선형복잡도 및 최고 차수 상관면역도를 동시에 만족하는 발생기이며, 입출력 무상관 발생기이다. 본 논문에서는 LM 발생기를 고속화 구현하기 위하여 m-병렬 LM 수열 발생기(m-parallel LM-BSG, Lee-Moon Binary Sequence Generator)를 제안하였으며, m=8인 병렬 발생기(8-parallel LM-BSG)를 세부 설계한다. 기존의 스트림 암호와 비교할 때, 제안된 알고리듬은 같은 안전성을 유지하면서 속도가 m=8배 빨라짐을 알 수 있었다. The LM generator is an improved summation generator with maximum period, near maximum linear complexity and maximum order of correlation immunity, and it has a property with the input-output correlation immunity In this paper, we propose the high-speed m-parallel LM-BSG and 8-parallel LM-BSG for detail as a design example. When compared with a conventional stream cipher, the properties of the proposed cipher exhibited the same crypto-degree (security) with a rt times faster processing.

EPL을 활용한 인터넷 중독 치료프로그램 개발에 관한 연구

이훈재 ( Hun Jae Lee ) 전주대학교 사회과학연구소( 구 사회과학종합연구소) 2013 社會科學論叢 Vol.28 No.2

이 연구는 인터넷 중독 문제를 겪고 있는 학생들에게 컴퓨터 교육으로서의 접근인 컴퓨터 활용을 병행한 프로그램을 투입하여 인터넷 중독증을 치료하는데 그 목적이 있다. 연구 목적을 달성하기 위하여 스크래치 프로그래밍을 활용한 게임 만들기와 자기성찰 활동, 미래 직업 탐색활동 등으로 구성된 프로그램을 구성하였다. 이 치료 프로그램의 적용을 통하여 인터넷 중독 학생들에게 여러 가지 유익한 효과를 볼 수 있다고 본다. 첫째, 인터넷 이용 시간 단축이나 게임에 대한 몰입과 같은 중독증을 개선시키는 효과를 가져 올 것이다. 둘째, 본 치료프로그램은 대상자들의 인터넷에 대한 사고의 전환과 지적 능력의 향상을 가져올 것이다. 인터넷을 하는 것만이 재미있는 것이 아니라, 직접 내가 만들어 보고, 그것을 동료들과 공유하면서 프로그램제작의 즐거움을 알 수 있을 것이며, 알고리즘적 사고와 창의적 사고를 훈련함으로써 지적 사고력을 높이게 될 것이다. 셋째, 본 치료프로그램은 대상자들의 정의적 영역에도 긍정적인 효과를 가져와. 미래의 직업에 대한 탐색하는 시간을 통해 직업관의 깊이와 넓이를 넓히고, 자기성찰을 통한 반성을 통하여 메타자아를 발견하여 자신을 돌아볼 수 있으며, 자신감?성취감 등을 갖게 될 것이다. The purpose of this study is to treat the students addicted to the internet by implementing a program using computers. In order to accomplish the purpose, the program was created by combining the game making activities using scratch programming, self-examination activities, and future occupation search activities. This treatment program will have major positive effects on the students who are addicted to the internet. First, it will be effective for reducing the time for using the internet and it will also improve the addictiveness such as being immersed in playing games. Second, there will be a change in attitude toward the internet and an improvement in intellectual capacity of the students. They will realize the fun of making and sharing the programs with friends, and their thinking skills will be improved by getting training for algorithmic and creative thinking. Third, this treatment program will have positive effects on the students` affective domain. They will have deeper and wider perspective on occupation by searching their future occupation, and discover the meta-ego through self-examination., which in turn, help them gain confidence and feel a sense of accomplishment.

경혈지압법이 고혈압약 복용환자에게 미치는 영향

이훈재(Hoon-Jae Lee),이상설(Sang-Seol Lee) 한국의료정보교육협회 2016 보건의료생명과학논문지 Vol.4 No.2

본 연구는 농촌지역 보건소에서 의료서비스를 받고 있는 농촌 어르신들을 대상으로 고혈압약 복용 환자를 대상으로 경혈지압법을 시행하여 혈압 조절에 대한 효과가 있는지를 시험하는 실험 연구를 실시하였다. This study was conducted with elderly patients with high blood pressure who were taking antihypertensive drugs. The purposes of this study are to prove the therapeutic effects of acupoint massage therapy on high blood pressure and to check the possibility of using acupoint massage therapy as a means for mutual healthcare among the elderly in rural areas where medical services are not readily available.

의학학술지 게재논문들에서의 통계학적 방법론 활용현황 및 소아알레르기 호흡기학회지의 질 향상을 위한 제언

이훈재 ( Hun Jae Lee ),정수경 ( Su Kyung Jung ) 대한소아알레르기호흡기학회(구 대한소아알레르기 및 호흡기학회) 2011 소아알레르기 및 호흡기학회지 Vol.21 No.3

Statistical analysis is an essential component of all biomedical research. Use of descriptive and inferential analysis enables researchers to summarize findings and conduct generalizations from research findings. Physicians must keep current with clinical information to practice evidence-based medicine. In doing so, physicians need to access reports of original research. This requires the reader to critically appraise the design, conduct, and analysis of each study and subsequently interpret the results. However, many surveys reveal prevalent statistical errors in articles in medical journals, and it is also clear that many physicians are seriously unfamiliar with statistical methods. This constitutes a major barrier to the development of medical research. Given this situation, this review article discusses the use of statistical methods in medical journal articles, the status of statistical errors among them, and the results of evaluation of physician` understanding of statistical methods. Moreover, this article introduces the current trend in statistical reviews to improve the quality of medical journal articles, and explains the uniform requirements for manuscripts submitted to medical journals. Finally, the article proposes several specific ways to improve the quality of the Pediatric Allergy and Respiratory Disease. [Pediatr Allergy Respir Dis(Korea) 2011;21:144-155]

금식 여부 및 측정 시간에 따른 13C-요소호기검사 결과의 평가

이상우,최재현,이성준,이구,이홍식,김창덕,진윤태,엄순호,류호상,송치욱,현진해,전훈재 대한소화기학회 2000 대한소화기학회지 Vol.35 No.5

Background/Aims : This study was designed to evaluate whether the result of 13C-urea breath test (UBT) was influenced by fasting status and to assess the adequate test duration for sample collection. Methods : Twenty-five volunteers were enrolled in this study. Their results were concordant in histology and standard (fasting) UBT for the diagnosis of Helicobacter pylori (H. pylori) infection. Standard UBT was performed after 4-hour-fasting and nonfasting UBT was performed within 1 hour after each meal for the same subjects at one week interval. The breath samples were collected just before and at 5, 10, 15, 20, 25, 30, 35, 40, 50, and 60 minutes after test meal (HelikitTM) and analyzed by isotope ratio mass spectrometer. H. pylori infection was defined as Δ13CO2 at 30 minutes was over 4%. Results : Of 25 volunteers, 13 were infected by H. pylori. Diagnosis of H. pylori the case in which infection was completely concordant in both standard and nonfasting states. In H. pylori infected group, Δ13CO2 was signifantly decreased in nonfasting state than standard state, and the mean Δ13CO2 of both states was the highest at 20 minutes after test meal. Ten minutes were sufficient to obtain ΔCO2 for diagnosis of H. pylori infection. Conclusions: The diagnosis of H. pylori infection is not affected by whether UBT using 75 mg of 13C-urea containing HelikitTM is performed in nonfasting state or its test duration is shortened.

소화성 궤양에서 저용량 Clarithromycin 삼제요법의 Helicobacter pylori 박멸률

이상우,권오상,이구,이홍식,김창덕,진윤태,최재현,엄순호,류호상,전훈재,송치욱,허병원,김광희,현진해 대한소화기학회 1999 대한소화기학회지 Vol.34 No.1

Background/Aims: A clear therapeutic regimen for the optimal treatment of Helicobacter pylori (H. pylori) infection has not emerged. We evaluated the eradication rate and side effects of triple regimen with low-dose clarithromycin (0.5 g/day). Methods: One hundred and one patients with duodenal ulcer (n=72), gastric ulcer (n=19), or combined duodenal and gastric ulcer (n=10) were enrolled. H. pylori infection was assessed by histology and rapid urease test before therapy and 4-6 weeks after finishing the treatment of triple regimen. Patients were treated either with omeprazole 20 mg b.d., amoxicillin 1.0 g b.d. and clarithromycin 250 mg b.d. (OAC; n=66) or with omeprazole 20 mg b.d., metronidazole 500 mg b.d. and clarithromycin 250 mg b.d. (OMC; n=35) for 2 weeks. Follow-up endoscopy was performed on 60 patients (OAC; n=41, OMC; n=19). Side effects were evaluated after completion of therapy. Results: Eradication rate of OAC group was 85.4% and that of OMC group was 78.9%. Side effects were observed in 18.2% of the OAC group and 17.1% of the OMC group. Conclusions: Both triple regimens have low rates of side effects. OAC regimen with low-dose clarithromycin shows slightly higher eradication rate of H. pylori than OMC regimen.

라텍스개질 콘크리트 종류에 따른 표면 박리 저항 특성

이훈재(Hoon-Jae Lee),김성환(Seong-Hwan Kim),홍창우(Chang-Woo Hong),윤경구(Kyong-Ku Yun) 한국콘크리트학회 2002 한국콘크리트학회 학술대회 논문집 Vol.2002 No.11

밀착된 예리한 식도 이물의 Ballon 이용 적출술

이정환,이상우,최재현,이성준,이홍식,김창덕,진윤태,류호상,전훈재,송치욱,현진해,허병원 대한소화기내시경학회 2000 Clinical Endoscopy Vol.21 No.1

Background/Aims : Sharp impacted esophageal foreign bodies can be very difficult to manage. When attempting to remove such objects inappropriately, life threatening complications, such as perforation can occur. Terefore, surgical intervention generally affords a safer approach. The aim of this study was to evaluate the safety and efficacy of endoscopic remval of sharp impacted esophageal foreign bodies using a dilatation method with an oral side balloon. Methods : A total of 17 patients (7 Male, 10 Female)with sharp impacted esophageal foreign bodies underwent endoscopic Extraction. The following technique was successfully performed; an oral side balloon (Top Co., Japan) for esophageal variceal sclerotherapy was attached on the distal part of the endoscope. Under local anesthesia, the endoscope was inserted near the proximal part of the esophageal foreign body. Then, the oral side balloon was gradually dilated. Dilataion of the proximal part of the esophagus made it possible to release the sharp impacted foreign body from the esophageal wall. Results : The types of foreign bodies were fish bones (6 cases), press-through packages (6 ases), chichen bones (3 cases), dentures (1 case), and a watch (1case). Endoscopic removal was successful in all 17 cases without complications such as perforation. Conclusions : This method of using an oral side balloon is safe and effective in removing sharp impacted esophageal foreign bodies, preventing, surgery and possible perforation.

Zero Suppression 알고리듬들의 여러 가지 특성 비교

이훈재(Hoon-Jae Lee),박영호(Young-Ho Park) 한국산업정보학회 2001 한국산업정보학회논문지 Vol.6 No.1

T4급 링크 암호에 적합한 암호 동기방식 제안

이훈재,김기환,강영진,이상곤,류영재,Lee, HoonJae,Kim, KiHwan,Kang, YongJin,Lee, Sang-Gon,Ryu, Young-Jae 한국정보통신학회 2018 한국정보통신학회논문지 Vol.22 No.1

현대 전장은 과학화 및 첨단화를 통해 빠른 현황 파악과 전력배치를 우선시하는 네트워크 중심 전으로 발전하고 있다. 이에 전술 데이터링크는 지속적으로 네트워크 속도 향상을 이루고 있으며, 최근 정찰용 무인기 및 각종 장비와의 무선통신을 위하여 보안 기술을 필요로 하고 있다. 또한 미래 정보전에서는 첨단 IT의 적극적인 활용이 필수적으로 요구되며, 다양한 시스템과 네트워크를 연동, 통합하기 위한 노력이 필요하다. 하지만 이러한 노력은 새롭게 변화하는 정보통신 환경에서 충분한 보안성을 전제 할 수 있어야 한다는 의미가 있다. 본 논문에서는 전술 데이터링크에 적합한 새로운 링크 암호동기방식을 제안한다. 제안한 암호 동기방식은 T4급 UAV 링크암호에 적합한 방식이며, 통신선로의 BER이 아주 낮은 경우에도 잘 견딜 수 있도록 설계하였고, 그 성능을 분석하였다. The modern battlefield is being developed as a network-centric warfare where priority is given to rapid status grasp and power deployment through scientification and modernization. Therefore, tactical data link has been continuously improving the network speed, and recently, security technology is required for wireless communication with the UAV and various devices for reconnaissance. In addition, the future information warfare will utilize advanced IT technology positively. Efforts are needed to integrate various systems and networks. However, these efforts are meaningful only when they can assume sufficient security in a newly changing information and communication environment. In this paper, we propose a new cryptographic synchronization for link encryption suitable for tactical data links. The proposed cryptographic synchronization is useful for T4 UAV link encryption, and it is also adaptable for lower BER, then we analyze the performances analysis of that.